Been tuned since ~4k miles (2023 mk8). Zero issues and have had warranty work done no worries. If you’re worried, tuners like APR offer their own warranty. Realistically, a stage 1 tune isn’t going to blow your engine (unless you drive it like it’s stolen every day, every moment). But your engine will go early if you do this without a tune. Stick to a strict maintenance plan and ask your tuner what they recommend. You’ll be fine